On 12/10/12 17:38, tom289...@safe-mail.net wrote: > Hello, > > I sent this to qemu-discuss a week ago and got no responses, so I'm trying > here. > > Looking at `qemu-kvm -device ?`, there seem to be multiple usb > implementations: > ich9-usb-uhci2 > ich9-usb-uhci3 > ich9-usb-uhci1 > piix3-usb-uhci > piix4-usb-uhci > vt82c686b-usb-uhci
These are all UHCI, just variants with different pci ids for the different chipsets we are emulating. USB 1.1. Stable. > ich9-usb-ehci1 > usb-ehci Likewise these basially differ in the pci id only. USB 2.0. Needs UHCI/OHCI companion controllers for USB 1.1 support (see docs/ich9-ehci-uhci.cfg). Stable. > nec-usb-xhci XHCI. USB 3.0. Mostly stable. Has seen less testing that the others though, both because it is the youngest code base and because guest support isn't that good. cheers, Gerd
